Expose private functions in grid_raytrace for unit testing.

src/gamelib/grid_raytrace.cpp

@@ -30,7 +30,9 @@
 #include <algorithm>
 
 namespace curry {
+#if !defined(BUILD_TESTING)
 	namespace {
+#endif
 		float inv_length (const vec2f& parVec) {
 			return 1.0f / std::sqrt(parVec.x() * parVec.x() + parVec.y() * parVec.y());
 		}
@@ -77,7 +79,9 @@ namespace curry {
 			//else
 				//return INFINITY;
 		}
+#if !defined(BUILD_TESTING)
 	} //unnamed namespace
+#endif
 
 	//see:
 	//http://stackoverflow.com/questions/24679963/precise-subpixel-line-drawing-algorithm-rasterization-algorithm

src/gamelib/grid_raytrace.hpp

@@ -20,12 +20,17 @@
 #pragma once
 
 #include "vector.hpp"
+#include "mycurry_toplevelConfig.h"
 #include <functional>
 
 namespace curry {
 	class WorldGrid;
 	class TileProperty;
 
+#if defined(BUILD_TESTING)
+	float segment_intersection (const vec2f& parA, const vec2f& parDirA, const vec2f& parB, const vec2f& parDirB);
+#endif
+
 	struct WorldTileProperty {
 		vec2us index;
 		const TileProperty* property;

src/mycurry_toplevelConfig.h.in

@@ -20,3 +20,4 @@
 #pragma once
 
 #define RESOURCES_PATH "@MYCURRY_RESOURCES_PATH@/"
+#cmakedefine BUILD_TESTING

test/unit/CMakeLists.txt

@@ -17,6 +17,7 @@ target_include_directories(${PROJECT_NAME}
 	PRIVATE ${CMAKE_SOURCE_DIR}/src/gamelib
 	PRIVATE ${CMAKE_SOURCE_DIR}/lib/vectorwrapper/include
 	PRIVATE ${CMAKE_SOURCE_DIR}/lib/tree-2.81/src
+	PRIVATE ${CMAKE_BINARY_DIR}
 )
 
 add_test(